AI SearchTopicalsYearlysNotesDashboardPricing
9709/73

Mathematics 9709/73 — October/November 2013

Cambridge A-Level · Probability & Statistics 2 · worked solutions for every part, with the mark scheme

6
questions
50
marks
75
minutes

Topics Sampling and Estimation · Hypothesis Tests · Linear Combinations of Random Variables · Continuous Random Variables · The Poisson Distribution

Q16MSampling and EstimationFree sample

A random sample of 80 values of a variable XX is taken and these values are summarised below.

n=80∑x=150.2∑x2=820.24n = 80 \quad \sum x = 150.2 \quad \sum x^2 = 820.24

Calculate unbiased estimates of the population mean and variance of XX and hence find a 95% confidence interval for the population mean of XX.

The rest of this paper

5 more questions
  • Q2Hypothesis Tests · Sampling and Estimation8M
  • Q3Continuous Random Variables8M
  • Q4The Poisson Distribution · Linear Combinations of Random Variables9M
  • Q5Sampling and Estimation · Hypothesis Tests9M
  • Q6Linear Combinations of Random Variables10M
Loading the full paper…